Download Long-Term Experiments with Acid Rain in Norwegian Forest by Gunnar Abrahamsen, Arne O. Stuanes, Bjorn Tveite PDF

By Gunnar Abrahamsen, Arne O. Stuanes, Bjorn Tveite

Acid rain is a major foreign environmental challenge. Scandinavian forests have suffered in particular serious harm, and feature been the point of interest of substantial study at the motives and affects of atmospheric pollutants. This publication provides the result of long term stories on acid rain in Norwegian forests. This examine tested soil chemistry and biology; the affects of acid rain on tree progress and food; and its effect on flooring plants, fungi, and seedling germination and improvement. Long-Term Experiments with Acid Rain in Norwegian wooded area Ecosystems is an enduring contribution to the literature on acid precipitation, and should be of curiosity to researchers in ecology, pollution, forestry and environmental chemistry.

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6 ... ~ 0 ... ····· '\. A ..... """"9- - - 9 ... .......... 0 .. 5 ~ v Q. 15. Effects of pH 6 (watered control) and pH 2 treatment on exchange· able Ca and Mg in the 0 horizon and the Bsl layer under Norway spruce (S), Scots pine (P), and European white birch (B) in experiment A-3 . D. Stuanes and G. Abrahamsen 58 directly correlated with the organic matter content as loss of ignition of that horizon (Fig. 1). Much smaller changes were found for the E horizons, and the changes were not related to time .

In B-2, only the inner 15 by 15 m plots were sampled, giving a distance of 10 m between sampling plots. Concentrations of exchangeable cations were determined after extraction with 1 M N~OAc at pH 7, or 1 M N~N03 at ambient soil pH. An extraction at pH 7 is more reliable when the added lime does not completely dissolve, whereas an extraction at ambient soil pH can, under those conditions, give a too high value for exchangeable calcium. What was measured as "exchangeable cations" was the sum of the watersoluble and exchangeable cations.

0............. £l - -.. "". /. .. 6 ... ~ 0 ... ····· '\. A ..... """"9- - - 9 ... .......... 0 .. 5 ~ v Q. 15. Effects of pH 6 (watered control) and pH 2 treatment on exchange· able Ca and Mg in the 0 horizon and the Bsl layer under Norway spruce (S), Scots pine (P), and European white birch (B) in experiment A-3 . D. Stuanes and G. Abrahamsen 58 directly correlated with the organic matter content as loss of ignition of that horizon (Fig. 1). Much smaller changes were found for the E horizons, and the changes were not related to time .

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